| #include "cache.h" |
| #include "refs.h" |
| #include "pkt-line.h" |
| #include "commit.h" |
| #include "tag.h" |
| #include "exec_cmd.h" |
| #include "pack.h" |
| #include "sideband.h" |
| #include "fetch-pack.h" |
| #include "remote.h" |
| #include "run-command.h" |
| #include "transport.h" |
| #include "version.h" |
| |
| static int transfer_unpack_limit = -1; |
| static int fetch_unpack_limit = -1; |
| static int unpack_limit = 100; |
| static int prefer_ofs_delta = 1; |
| static int no_done; |
| static int fetch_fsck_objects = -1; |
| static int transfer_fsck_objects = -1; |
| static int agent_supported; |
| |
| #define COMPLETE (1U << 0) |
| #define COMMON (1U << 1) |
| #define COMMON_REF (1U << 2) |
| #define SEEN (1U << 3) |
| #define POPPED (1U << 4) |
| |
| static int marked; |
| |
| /* |
| * After sending this many "have"s if we do not get any new ACK , we |
| * give up traversing our history. |
| */ |
| #define MAX_IN_VAIN 256 |
| |
| static struct commit_list *rev_list; |
| static int non_common_revs, multi_ack, use_sideband; |
| |
| static void rev_list_push(struct commit *commit, int mark) |
| { |
| if (!(commit->object.flags & mark)) { |
| commit->object.flags |= mark; |
| |
| if (!(commit->object.parsed)) |
| if (parse_commit(commit)) |
| return; |
| |
| commit_list_insert_by_date(commit, &rev_list); |
| |
| if (!(commit->object.flags & COMMON)) |
| non_common_revs++; |
| } |
| } |
| |
| static int rev_list_insert_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) |
| { |
| struct object *o = deref_tag(parse_object(sha1), refname, 0); |
| |
| if (o && o->type == OBJ_COMMIT) |
| rev_list_push((struct commit *)o, SEEN); |
| |
| return 0; |
| } |
| |
| static int clear_marks(const char *refname, const unsigned char *sha1, int flag, void *cb_data) |
| { |
| struct object *o = deref_tag(parse_object(sha1), refname, 0); |
| |
| if (o && o->type == OBJ_COMMIT) |
| clear_commit_marks((struct commit *)o, |
| COMMON | COMMON_REF | SEEN | POPPED); |
| return 0; |
| } |
| |
| /* |
| This function marks a rev and its ancestors as common. |
| In some cases, it is desirable to mark only the ancestors (for example |
| when only the server does not yet know that they are common). |
| */ |
| |
| static void mark_common(struct commit *commit, |
| int ancestors_only, int dont_parse) |
| { |
| if (commit != NULL && !(commit->object.flags & COMMON)) { |
| struct object *o = (struct object *)commit; |
| |
| if (!ancestors_only) |
| o->flags |= COMMON; |
| |
| if (!(o->flags & SEEN)) |
| rev_list_push(commit, SEEN); |
| else { |
| struct commit_list *parents; |
| |
| if (!ancestors_only && !(o->flags & POPPED)) |
| non_common_revs--; |
| if (!o->parsed && !dont_parse) |
| if (parse_commit(commit)) |
| return; |
| |
| for (parents = commit->parents; |
| parents; |
| parents = parents->next) |
| mark_common(parents->item, 0, dont_parse); |
| } |
| } |
| } |
| |
| /* |
| Get the next rev to send, ignoring the common. |
| */ |
| |
| static const unsigned char *get_rev(void) |
| { |
| struct commit *commit = NULL; |
| |
| while (commit == NULL) { |
| unsigned int mark; |
| struct commit_list *parents; |
| |
| if (rev_list == NULL || non_common_revs == 0) |
| return NULL; |
| |
| commit = rev_list->item; |
| if (!commit->object.parsed) |
| parse_commit(commit); |
| parents = commit->parents; |
| |
| commit->object.flags |= POPPED; |
| if (!(commit->object.flags & COMMON)) |
| non_common_revs--; |
| |
| if (commit->object.flags & COMMON) { |
| /* do not send "have", and ignore ancestors */ |
| commit = NULL; |
| mark = COMMON | SEEN; |
| } else if (commit->object.flags & COMMON_REF) |
| /* send "have", and ignore ancestors */ |
| mark = COMMON | SEEN; |
| else |
| /* send "have", also for its ancestors */ |
| mark = SEEN; |
| |
| while (parents) { |
| if (!(parents->item->object.flags & SEEN)) |
| rev_list_push(parents->item, mark); |
| if (mark & COMMON) |
| mark_common(parents->item, 1, 0); |
| parents = parents->next; |
| } |
| |
| rev_list = rev_list->next; |
| } |
| |
| return commit->object.sha1; |
| } |
| |
| enum ack_type { |
| NAK = 0, |
| ACK, |
| ACK_continue, |
| ACK_common, |
| ACK_ready |
| }; |
| |
| static void consume_shallow_list(struct fetch_pack_args *args, int fd) |
| { |
| if (args->stateless_rpc && args->depth > 0) { |
| /* If we sent a depth we will get back "duplicate" |
| * shallow and unshallow commands every time there |
| * is a block of have lines exchanged. |
| */ |
| char line[1000]; |
| while (packet_read_line(fd, line, sizeof(line))) { |
| if (!prefixcmp(line, "shallow ")) |
| continue; |
| if (!prefixcmp(line, "unshallow ")) |
| continue; |
| die("git fetch-pack: expected shallow list"); |
| } |
| } |
| } |
| |
| struct write_shallow_data { |
| struct strbuf *out; |
| int use_pack_protocol; |
| int count; |
| }; |
| |
| static int write_one_shallow(const struct commit_graft *graft, void *cb_data) |
| { |
| struct write_shallow_data *data = cb_data; |
| const char *hex = sha1_to_hex(graft->sha1); |
| data->count++; |
| if (data->use_pack_protocol) |
| packet_buf_write(data->out, "shallow %s", hex); |
| else { |
| strbuf_addstr(data->out, hex); |
| strbuf_addch(data->out, '\n'); |
| } |
| return 0; |
| } |
| |
| static int write_shallow_commits(struct strbuf *out, int use_pack_protocol) |
| { |
| struct write_shallow_data data; |
| data.out = out; |
| data.use_pack_protocol = use_pack_protocol; |
| data.count = 0; |
| for_each_commit_graft(write_one_shallow, &data); |
| return data.count; |
| } |
| |
| static enum ack_type get_ack(int fd, unsigned char *result_sha1) |
| { |
| static char line[1000]; |
| int len = packet_read_line(fd, line, sizeof(line)); |
| |
| if (!len) |
| die("git fetch-pack: expected ACK/NAK, got EOF"); |
| if (line[len-1] == '\n') |
| line[--len] = 0; |
| if (!strcmp(line, "NAK")) |
| return NAK; |
| if (!prefixcmp(line, "ACK ")) { |
| if (!get_sha1_hex(line+4, result_sha1)) { |
| if (strstr(line+45, "continue")) |
| return ACK_continue; |
| if (strstr(line+45, "common")) |
| return ACK_common; |
| if (strstr(line+45, "ready")) |
| return ACK_ready; |
| return ACK; |
| } |
| } |
| die("git fetch_pack: expected ACK/NAK, got '%s'", line); |
| } |
| |
| static void send_request(struct fetch_pack_args *args, |
| int fd, struct strbuf *buf) |
| { |
| if (args->stateless_rpc) { |
| send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX); |
| packet_flush(fd); |
| } else |
| safe_write(fd, buf->buf, buf->len); |
| } |
| |
| static void insert_one_alternate_ref(const struct ref *ref, void *unused) |
| { |
| rev_list_insert_ref(NULL, ref->old_sha1, 0, NULL); |
| } |
| |
| #define INITIAL_FLUSH 16 |
| #define PIPESAFE_FLUSH 32 |
| #define LARGE_FLUSH 1024 |
| |
| static int next_flush(struct fetch_pack_args *args, int count) |
| { |
| int flush_limit = args->stateless_rpc ? LARGE_FLUSH : PIPESAFE_FLUSH; |
| |
| if (count < flush_limit) |
| count <<= 1; |
| else |
| count += flush_limit; |
| return count; |
| } |
| |
| static int find_common(struct fetch_pack_args *args, |
| int fd[2], unsigned char *result_sha1, |
| struct ref *refs) |
| { |
| int fetching; |
| int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval; |
| const unsigned char *sha1; |
| unsigned in_vain = 0; |
| int got_continue = 0; |
| int got_ready = 0; |
| struct strbuf req_buf = STRBUF_INIT; |
| size_t state_len = 0; |
| |
| if (args->stateless_rpc && multi_ack == 1) |
| die("--stateless-rpc requires multi_ack_detailed"); |
| if (marked) |
| for_each_ref(clear_marks, NULL); |
| marked = 1; |
| |
| for_each_ref(rev_list_insert_ref, NULL); |
| for_each_alternate_ref(insert_one_alternate_ref, NULL); |
| |
| fetching = 0; |
| for ( ; refs ; refs = refs->next) { |
| unsigned char *remote = refs->old_sha1; |
| const char *remote_hex; |
| struct object *o; |
| |
| /* |
| * If that object is complete (i.e. it is an ancestor of a |
| * local ref), we tell them we have it but do not have to |
| * tell them about its ancestors, which they already know |
| * about. |
| * |
| * We use lookup_object here because we are only |
| * interested in the case we *know* the object is |
| * reachable and we have already scanned it. |
| */ |
| if (((o = lookup_object(remote)) != NULL) && |
| (o->flags & COMPLETE)) { |
| continue; |
| } |
| |
| remote_hex = sha1_to_hex(remote); |
| if (!fetching) { |
| struct strbuf c = STRBUF_INIT; |
| if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed"); |
| if (multi_ack == 1) strbuf_addstr(&c, " multi_ack"); |
| if (no_done) strbuf_addstr(&c, " no-done"); |
| if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k"); |
| if (use_sideband == 1) strbuf_addstr(&c, " side-band"); |
| if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack"); |
| if (args->no_progress) strbuf_addstr(&c, " no-progress"); |
| if (args->include_tag) strbuf_addstr(&c, " include-tag"); |
| if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta"); |
| if (agent_supported) strbuf_addf(&c, " agent=%s", |
| git_user_agent_sanitized()); |
| packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf); |
| strbuf_release(&c); |
| } else |
| packet_buf_write(&req_buf, "want %s\n", remote_hex); |
| fetching++; |
| } |
| |
| if (!fetching) { |
| strbuf_release(&req_buf); |
| packet_flush(fd[1]); |
| return 1; |
| } |
| |
| if (is_repository_shallow()) |
| write_shallow_commits(&req_buf, 1); |
| if (args->depth > 0) |
| packet_buf_write(&req_buf, "deepen %d", args->depth); |
| packet_buf_flush(&req_buf); |
| state_len = req_buf.len; |
| |
| if (args->depth > 0) { |
| char line[1024]; |
| unsigned char sha1[20]; |
| |
| send_request(args, fd[1], &req_buf); |
| while (packet_read_line(fd[0], line, sizeof(line))) { |
| if (!prefixcmp(line, "shallow ")) { |
| if (get_sha1_hex(line + 8, sha1)) |
| die("invalid shallow line: %s", line); |
| register_shallow(sha1); |
| continue; |
| } |
| if (!prefixcmp(line, "unshallow ")) { |
| if (get_sha1_hex(line + 10, sha1)) |
| die("invalid unshallow line: %s", line); |
| if (!lookup_object(sha1)) |
| die("object not found: %s", line); |
| /* make sure that it is parsed as shallow */ |
| if (!parse_object(sha1)) |
| die("error in object: %s", line); |
| if (unregister_shallow(sha1)) |
| die("no shallow found: %s", line); |
| continue; |
| } |
| die("expected shallow/unshallow, got %s", line); |
| } |
| } else if (!args->stateless_rpc) |
| send_request(args, fd[1], &req_buf); |
| |
| if (!args->stateless_rpc) { |
| /* If we aren't using the stateless-rpc interface |
| * we don't need to retain the headers. |
| */ |
| strbuf_setlen(&req_buf, 0); |
| state_len = 0; |
| } |
| |
| flushes = 0; |
| retval = -1; |
| while ((sha1 = get_rev())) { |
| packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1)); |
| if (args->verbose) |
| fprintf(stderr, "have %s\n", sha1_to_hex(sha1)); |
| in_vain++; |
| if (flush_at <= ++count) { |
| int ack; |
| |
| packet_buf_flush(&req_buf); |
| send_request(args, fd[1], &req_buf); |
| strbuf_setlen(&req_buf, state_len); |
| flushes++; |
| flush_at = next_flush(args, count); |
| |
| /* |
| * We keep one window "ahead" of the other side, and |
| * will wait for an ACK only on the next one |
| */ |
| if (!args->stateless_rpc && count == INITIAL_FLUSH) |
| continue; |
| |
| consume_shallow_list(args, fd[0]); |
| do { |
| ack = get_ack(fd[0], result_sha1); |
| if (args->verbose && ack) |
| fprintf(stderr, "got ack %d %s\n", ack, |
| sha1_to_hex(result_sha1)); |
| switch (ack) { |
| case ACK: |
| flushes = 0; |
| multi_ack = 0; |
| retval = 0; |
| goto done; |
| case ACK_common: |
| case ACK_ready: |
| case ACK_continue: { |
| struct commit *commit = |
| lookup_commit(result_sha1); |
| if (!commit) |
| die("invalid commit %s", sha1_to_hex(result_sha1)); |
| if (args->stateless_rpc |
| && ack == ACK_common |
| && !(commit->object.flags & COMMON)) { |
| /* We need to replay the have for this object |
| * on the next RPC request so the peer knows |
| * it is in common with us. |
| */ |
| const char *hex = sha1_to_hex(result_sha1); |
| packet_buf_write(&req_buf, "have %s\n", hex); |
| state_len = req_buf.len; |
| } |
| mark_common(commit, 0, 1); |
| retval = 0; |
| in_vain = 0; |
| got_continue = 1; |
| if (ack == ACK_ready) { |
| rev_list = NULL; |
| got_ready = 1; |
| } |
| break; |
| } |
| } |
| } while (ack); |
| flushes--; |
| if (got_continue && MAX_IN_VAIN < in_vain) { |
| if (args->verbose) |
| fprintf(stderr, "giving up\n"); |
| break; /* give up */ |
| } |
| } |
| } |
| done: |
| if (!got_ready || !no_done) { |
| packet_buf_write(&req_buf, "done\n"); |
| send_request(args, fd[1], &req_buf); |
| } |
| if (args->verbose) |
| fprintf(stderr, "done\n"); |
| if (retval != 0) { |
| multi_ack = 0; |
| flushes++; |
| } |
| strbuf_release(&req_buf); |
| |
| consume_shallow_list(args, fd[0]); |
| while (flushes || multi_ack) { |
| int ack = get_ack(fd[0], result_sha1); |
| if (ack) { |
| if (args->verbose) |
| fprintf(stderr, "got ack (%d) %s\n", ack, |
| sha1_to_hex(result_sha1)); |
| if (ack == ACK) |
| return 0; |
| multi_ack = 1; |
| continue; |
| } |
| flushes--; |
| } |
| /* it is no error to fetch into a completely empty repo */ |
| return count ? retval : 0; |
| } |
| |
| static struct commit_list *complete; |
| |
| static int mark_complete(const char *refname, const unsigned char *sha1, int flag, void *cb_data) |
| { |
| struct object *o = parse_object(sha1); |
| |
| while (o && o->type == OBJ_TAG) { |
| struct tag *t = (struct tag *) o; |
| if (!t->tagged) |
| break; /* broken repository */ |
| o->flags |= COMPLETE; |
| o = parse_object(t->tagged->sha1); |
| } |
| if (o && o->type == OBJ_COMMIT) { |
| struct commit *commit = (struct commit *)o; |
| if (!(commit->object.flags & COMPLETE)) { |
| commit->object.flags |= COMPLETE; |
| commit_list_insert_by_date(commit, &complete); |
| } |
| } |
| return 0; |
| } |
| |
| static void mark_recent_complete_commits(struct fetch_pack_args *args, |
| unsigned long cutoff) |
| { |
| while (complete && cutoff <= complete->item->date) { |
| if (args->verbose) |
| fprintf(stderr, "Marking %s as complete\n", |
| sha1_to_hex(complete->item->object.sha1)); |
| pop_most_recent_commit(&complete, COMPLETE); |
| } |
| } |
| |
| static int non_matching_ref(struct string_list_item *item, void *unused) |
| { |
| if (item->util) { |
| item->util = NULL; |
| return 0; |
| } |
| else |
| return 1; |
| } |
| |
| static void filter_refs(struct fetch_pack_args *args, |
| struct ref **refs, struct string_list *sought) |
| { |
| struct ref *newlist = NULL; |
| struct ref **newtail = &newlist; |
| struct ref *ref, *next; |
| int sought_pos; |
| |
| sought_pos = 0; |
| for (ref = *refs; ref; ref = next) { |
| int keep = 0; |
| next = ref->next; |
| if (!memcmp(ref->name, "refs/", 5) && |
| check_refname_format(ref->name + 5, 0)) |
| ; /* trash */ |
| else { |
| while (sought_pos < sought->nr) { |
| int cmp = strcmp(ref->name, sought->items[sought_pos].string); |
| if (cmp < 0) |
| break; /* definitely do not have it */ |
| else if (cmp == 0) { |
| keep = 1; /* definitely have it */ |
| sought->items[sought_pos++].util = "matched"; |
| break; |
| } |
| else |
| sought_pos++; /* might have it; keep looking */ |
| } |
| } |
| |
| if (! keep && args->fetch_all && |
| (!args->depth || prefixcmp(ref->name, "refs/tags/"))) |
| keep = 1; |
| |
| if (keep) { |
| *newtail = ref; |
| ref->next = NULL; |
| newtail = &ref->next; |
| } else { |
| free(ref); |
| } |
| } |
| |
| filter_string_list(sought, 0, non_matching_ref, NULL); |
| *refs = newlist; |
| } |
| |
| static void mark_alternate_complete(const struct ref *ref, void *unused) |
| { |
| mark_complete(NULL, ref->old_sha1, 0, NULL); |
| } |
| |
| static int everything_local(struct fetch_pack_args *args, |
| struct ref **refs, struct string_list *sought) |
| { |
| struct ref *ref; |
| int retval; |
| unsigned long cutoff = 0; |
| |
| save_commit_buffer = 0; |
| |
| for (ref = *refs; ref; ref = ref->next) { |
| struct object *o; |
| |
| if (!has_sha1_file(ref->old_sha1)) |
| continue; |
| |
| o = parse_object(ref->old_sha1); |
| if (!o) |
| continue; |
| |
| /* We already have it -- which may mean that we were |
| * in sync with the other side at some time after |
| * that (it is OK if we guess wrong here). |
| */ |
| if (o->type == OBJ_COMMIT) { |
| struct commit *commit = (struct commit *)o; |
| if (!cutoff || cutoff < commit->date) |
| cutoff = commit->date; |
| } |
| } |
| |
| if (!args->depth) { |
| for_each_ref(mark_complete, NULL); |
| for_each_alternate_ref(mark_alternate_complete, NULL); |
| if (cutoff) |
| mark_recent_complete_commits(args, cutoff); |
| } |
| |
| /* |
| * Mark all complete remote refs as common refs. |
| * Don't mark them common yet; the server has to be told so first. |
| */ |
| for (ref = *refs; ref; ref = ref->next) { |
| struct object *o = deref_tag(lookup_object(ref->old_sha1), |
| NULL, 0); |
| |
| if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) |
| continue; |
| |
| if (!(o->flags & SEEN)) { |
| rev_list_push((struct commit *)o, COMMON_REF | SEEN); |
| |
| mark_common((struct commit *)o, 1, 1); |
| } |
| } |
| |
| filter_refs(args, refs, sought); |
| |
| for (retval = 1, ref = *refs; ref ; ref = ref->next) { |
| const unsigned char *remote = ref->old_sha1; |
| unsigned char local[20]; |
| struct object *o; |
| |
| o = lookup_object(remote); |
| if (!o || !(o->flags & COMPLETE)) { |
| retval = 0; |
| if (!args->verbose) |
| continue; |
| fprintf(stderr, |
| "want %s (%s)\n", sha1_to_hex(remote), |
| ref->name); |
| continue; |
| } |
| |
| hashcpy(ref->new_sha1, local); |
| if (!args->verbose) |
| continue; |
| fprintf(stderr, |
| "already have %s (%s)\n", sha1_to_hex(remote), |
| ref->name); |
| } |
| return retval; |
| } |
| |
| static int sideband_demux(int in, int out, void *data) |
| { |
| int *xd = data; |
| |
| int ret = recv_sideband("fetch-pack", xd[0], out); |
| close(out); |
| return ret; |
| } |
| |
| static int get_pack(struct fetch_pack_args *args, |
| int xd[2], char **pack_lockfile) |
| { |
| struct async demux; |
| const char *argv[20]; |
| char keep_arg[256]; |
| char hdr_arg[256]; |
| const char **av; |
| int do_keep = args->keep_pack; |
| struct child_process cmd; |
| |
| memset(&demux, 0, sizeof(demux)); |
| if (use_sideband) { |
| /* xd[] is talking with upload-pack; subprocess reads from |
| * xd[0], spits out band#2 to stderr, and feeds us band#1 |
| * through demux->out. |
| */ |
| demux.proc = sideband_demux; |
| demux.data = xd; |
| demux.out = -1; |
| if (start_async(&demux)) |
| die("fetch-pack: unable to fork off sideband" |
| " demultiplexer"); |
| } |
| else |
| demux.out = xd[0]; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| cmd.argv = argv; |
| av = argv; |
| *hdr_arg = 0; |
| if (!args->keep_pack && unpack_limit) { |
| struct pack_header header; |
| |
| if (read_pack_header(demux.out, &header)) |
| die("protocol error: bad pack header"); |
| snprintf(hdr_arg, sizeof(hdr_arg), |
| "--pack_header=%"PRIu32",%"PRIu32, |
| ntohl(header.hdr_version), ntohl(header.hdr_entries)); |
| if (ntohl(header.hdr_entries) < unpack_limit) |
| do_keep = 0; |
| else |
| do_keep = 1; |
| } |
| |
| if (do_keep) { |
| if (pack_lockfile) |
| cmd.out = -1; |
| *av++ = "index-pack"; |
| *av++ = "--stdin"; |
| if (!args->quiet && !args->no_progress) |
| *av++ = "-v"; |
| if (args->use_thin_pack) |
| *av++ = "--fix-thin"; |
| if (args->lock_pack || unpack_limit) { |
| int s = sprintf(keep_arg, |
| "--keep=fetch-pack %"PRIuMAX " on ", (uintmax_t) getpid()); |
| if (gethostname(keep_arg + s, sizeof(keep_arg) - s)) |
| strcpy(keep_arg + s, "localhost"); |
| *av++ = keep_arg; |
| } |
| } |
| else { |
| *av++ = "unpack-objects"; |
| if (args->quiet || args->no_progress) |
| *av++ = "-q"; |
| } |
| if (*hdr_arg) |
| *av++ = hdr_arg; |
| if (fetch_fsck_objects >= 0 |
| ? fetch_fsck_objects |
| : transfer_fsck_objects >= 0 |
| ? transfer_fsck_objects |
| : 0) |
| *av++ = "--strict"; |
| *av++ = NULL; |
| |
| cmd.in = demux.out; |
| cmd.git_cmd = 1; |
| if (start_command(&cmd)) |
| die("fetch-pack: unable to fork off %s", argv[0]); |
| if (do_keep && pack_lockfile) { |
| *pack_lockfile = index_pack_lockfile(cmd.out); |
| close(cmd.out); |
| } |
| |
| if (finish_command(&cmd)) |
| die("%s failed", argv[0]); |
| if (use_sideband && finish_async(&demux)) |
| die("error in sideband demultiplexer"); |
| return 0; |
| } |
| |
| static struct ref *do_fetch_pack(struct fetch_pack_args *args, |
| int fd[2], |
| const struct ref *orig_ref, |
| struct string_list *sought, |
| char **pack_lockfile) |
| { |
| struct ref *ref = copy_ref_list(orig_ref); |
| unsigned char sha1[20]; |
| const char *agent_feature; |
| int agent_len; |
| |
| sort_ref_list(&ref, ref_compare_name); |
| |
| if (is_repository_shallow() && !server_supports("shallow")) |
| die("Server does not support shallow clients"); |
| if (server_supports("multi_ack_detailed")) { |
| if (args->verbose) |
| fprintf(stderr, "Server supports multi_ack_detailed\n"); |
| multi_ack = 2; |
| if (server_supports("no-done")) { |
| if (args->verbose) |
| fprintf(stderr, "Server supports no-done\n"); |
| if (args->stateless_rpc) |
| no_done = 1; |
| } |
| } |
| else if (server_supports("multi_ack")) { |
| if (args->verbose) |
| fprintf(stderr, "Server supports multi_ack\n"); |
| multi_ack = 1; |
| } |
| if (server_supports("side-band-64k")) { |
| if (args->verbose) |
| fprintf(stderr, "Server supports side-band-64k\n"); |
| use_sideband = 2; |
| } |
| else if (server_supports("side-band")) { |
| if (args->verbose) |
| fprintf(stderr, "Server supports side-band\n"); |
| use_sideband = 1; |
| } |
| if (!server_supports("thin-pack")) |
| args->use_thin_pack = 0; |
| if (!server_supports("no-progress")) |
| args->no_progress = 0; |
| if (!server_supports("include-tag")) |
| args->include_tag = 0; |
| if (server_supports("ofs-delta")) { |
| if (args->verbose) |
| fprintf(stderr, "Server supports ofs-delta\n"); |
| } else |
| prefer_ofs_delta = 0; |
| |
| if ((agent_feature = server_feature_value("agent", &agent_len))) { |
| agent_supported = 1; |
| if (args->verbose && agent_len) |
| fprintf(stderr, "Server version is %.*s\n", |
| agent_len, agent_feature); |
| } |
| |
| if (everything_local(args, &ref, sought)) { |
| packet_flush(fd[1]); |
| goto all_done; |
| } |
| if (find_common(args, fd, sha1, ref) < 0) |
| if (!args->keep_pack) |
| /* When cloning, it is not unusual to have |
| * no common commit. |
| */ |
| warning("no common commits"); |
| |
| if (args->stateless_rpc) |
| packet_flush(fd[1]); |
| if (get_pack(args, fd, pack_lockfile)) |
| die("git fetch-pack: fetch failed."); |
| |
| all_done: |
| return ref; |
| } |
| |
| static int fetch_pack_config(const char *var, const char *value, void *cb) |
| { |
| if (strcmp(var, "fetch.unpacklimit") == 0) { |
| fetch_unpack_limit = git_config_int(var, value); |
| return 0; |
| } |
| |
| if (strcmp(var, "transfer.unpacklimit") == 0) { |
| transfer_unpack_limit = git_config_int(var, value); |
| return 0; |
| } |
| |
| if (strcmp(var, "repack.usedeltabaseoffset") == 0) { |
| prefer_ofs_delta = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "fetch.fsckobjects")) { |
| fetch_fsck_objects = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "transfer.fsckobjects")) { |
| transfer_fsck_objects = git_config_bool(var, value); |
| return 0; |
| } |
| |
| return git_default_config(var, value, cb); |
| } |
| |
| static void fetch_pack_setup(void) |
| { |
| static int did_setup; |
| if (did_setup) |
| return; |
| git_config(fetch_pack_config, NULL); |
| if (0 <= transfer_unpack_limit) |
| unpack_limit = transfer_unpack_limit; |
| else if (0 <= fetch_unpack_limit) |
| unpack_limit = fetch_unpack_limit; |
| did_setup = 1; |
| } |
| |
| struct ref *fetch_pack(struct fetch_pack_args *args, |
| int fd[], struct child_process *conn, |
| const struct ref *ref, |
| const char *dest, |
| struct string_list *sought, |
| char **pack_lockfile) |
| { |
| struct stat st; |
| struct ref *ref_cpy; |
| |
| fetch_pack_setup(); |
| if (args->depth > 0) { |
| if (stat(git_path("shallow"), &st)) |
| st.st_mtime = 0; |
| } |
| |
| if (sought->nr) { |
| sort_string_list(sought); |
| string_list_remove_duplicates(sought, 0); |
| } |
| |
| if (!ref) { |
| packet_flush(fd[1]); |
| die("no matching remote head"); |
| } |
| ref_cpy = do_fetch_pack(args, fd, ref, sought, pack_lockfile); |
| |
| if (args->depth > 0) { |
| static struct lock_file lock; |
| struct cache_time mtime; |
| struct strbuf sb = STRBUF_INIT; |
| char *shallow = git_path("shallow"); |
| int fd; |
| |
| mtime.sec = st.st_mtime; |
| mtime.nsec = ST_MTIME_NSEC(st); |
| if (stat(shallow, &st)) { |
| if (mtime.sec) |
| die("shallow file was removed during fetch"); |
| } else if (st.st_mtime != mtime.sec |
| #ifdef USE_NSEC |
| || ST_MTIME_NSEC(st) != mtime.nsec |
| #endif |
| ) |
| die("shallow file was changed during fetch"); |
| |
| fd = hold_lock_file_for_update(&lock, shallow, |
| LOCK_DIE_ON_ERROR); |
| if (!write_shallow_commits(&sb, 0) |
| || write_in_full(fd, sb.buf, sb.len) != sb.len) { |
| unlink_or_warn(shallow); |
| rollback_lock_file(&lock); |
| } else { |
| commit_lock_file(&lock); |
| } |
| strbuf_release(&sb); |
| } |
| |
| reprepare_packed_git(); |
| return ref_cpy; |
| } |